GCSE Topic Flashcards
Weight=?
Mass x gravitational field
What are the three states of matter
Solid,liquid,gas
What is deposition
A gas turns into solid without becoming a liquid
What is melting
Solid turns into a liquid
What is evaporation/boiling
A liquid turns into a gas
What is freezing
When a liquid turns into a solid
What is condensation
A gas turns into a liquid
What is sublimation
A solid turns into a gas without turning into a liquid
What is deposition
A gas turns into a solid, without becoming a liquid first
Wha5 happens during melting, evaporation/boiling
Energy from heat is used to overcome forces of attravtiom between particles. Parcticles become free and move around each other in random arrangment
What happens during freezing and condensation
Energy is transferred from the particles to the surroundings forming strange forces of attraction.
Elements are
Pure substances and there melting point is fixed
Mixtures are
impure substances and there melting point is a range of temperatures
Compounds are
Pure substances and there melting point is fixed
Independent variable is
The thing you change
Dependent variable is
The thing you measure
Control variable
The thing you keep the same
A pure substance always has
One pure compounds risen above the line
An impure/mixture substance always has
2 compounds risen above the line
The highest compound on paper chromatography is always
The most soluble
RF VALUE=
Distance moved by the spot/solute divided by
Distance moved by the solvent
RF value is always…
below one
